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Antistatic flame-retardant polyethylene composition

A technology of flame-retardant polyethylene and polyethylene, applied in other chemical processes, chemical instruments and methods, etc., can solve problems affecting the melt viscosity of composite materials, extrusion instability, large torque, etc., and achieve excellent antistatic properties, The effect of improving mechanical properties and reducing working intensity

Inactive Publication Date: 2005-05-18
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the continuous development of carbon black technology, in recent years, a small amount of carbon black can be added to the composite material to obtain a good antistatic effect. However, due to the large specific surface of the conductive carbon black, adding it to the resin will still seriously Affect the melt viscosity of the composite material, and there will be excessive torque and unstable extrusion during the extrusion process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Composition formula:

[0041] HDPE: 40 parts

[0042] Antistatic masterbatch: 35 parts

[0043] Flame retardant masterbatch: 25 parts

[0044] in:

[0045] The formula of antistatic masterbatch is:

[0046] Linear Low Density Polyethylene: 100 parts

[0047] Special conductive carbon black (specific surface area 828m 2 / g): 30 commercially available

[0048] Ordinary conductive carbon black (specific surface area 164m 2 / g): American Cabot Company 8 parts

[0049] Antioxidant 1010: 0.4 parts Antioxidant 168: 0.4 parts

[0050] Titanate coupling agent (monoalkyl): 3.5 parts

[0051] Polyethylene wax: 4 parts

[0052] Flame retardant masterbatch formula:

[0053] Linear Low Density Polyethylene: 100 parts

[0054] Decabromodiphenyl ether: 125 parts

[0055] Antimony trioxide: 25 parts

[0056] Antioxidant: 1010: 1.5 parts 168: 1.5 parts

[0057] The performance index of the composition obtained through twin-screw extruder granulation is as follows:

[0058] ...

Embodiment 2

[0066] Composition formula:

[0067] HDPE: 40 parts

[0068] Antistatic masterbatch: 30 parts

[0069] Flame retardant masterbatch: 30 parts

[0070] in:

[0071] The formula of antistatic masterbatch and flame retardant masterbatch formula are identical with embodiment 1

[0072] The performance index of the composition obtained through twin-screw extruder granulation is as follows:

[0073] Melt flow rate: 0.4g / 10min (190℃ 2.16kg)

[0074] Tensile yield stress: 18.52MPa

[0075] Elongation at break: 685

[0076] Surface resistance: 2.4×10 3 Ω

[0077] Burning with flame: 1.54s

[0078] Flameless combustion: 3.68s

[0079] The double-resistant pipe produced by the composition fully meets the requirements of the industry standard (MT558.1-1996) of the Ministry of Coal of the People's Republic of China through the inspection of the national authority.

Embodiment 3

[0081] The formula of antistatic masterbatch and flame retardant masterbatch is the same as embodiment 1:

[0082] The formula of composition is:

[0083] HDPE: 22 parts

[0084] Polyethylene antistatic masterbatch: 38 parts

[0085] Polyethylene flame retardant masterbatch: 40 parts

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Abstract

The antistatic flame-retardant polyethylene composition consists of high density polyethylene 20-45 weight portions, antistatic polyethylene agglomerate 30-40 weight portions, and flame-retardant polyethylene agglomerate 25-40 weight portions. The antistatic polyethylene agglomerate includes two kinds of conducting carbon black of different specific surface areas and processed with processing agent, and has synergistic antistatic and flame-retardant performance, excellent machining performance and mechanical performance. The flame-retardant polyethylene agglomerate is composite flame retardant comprising halogen-containing organic compound and bromobenzene ether as main flame retardant and Sb2O3 as synergist and smoke suppressor. The composition has excellent antistatic performance, flame retardant performance, machining performance and mechanical performance, and is used in producing pipes in coal mine.

Description

technical field [0001] The invention belongs to the technical field of plastic processing and application, and relates to an antistatic and flame retardant plastic composition. Background technique [0002] In recent years, due to the advantages of low price, light weight, convenient installation, and environmental protection, polyethylene pipes have been widely used in various fields due to the promotion of national policies. Among them, in addition to the physical and mechanical properties of general plastic pipes, polyethylene pipes for mining should also meet the special requirements of coal mines, that is, they must have antistatic properties, self-extinguishing properties, and the combustion products must not be toxic. Polyethylene is an organic polymer material with a very high volume resistivity of 10 16-20 Ω / cm, static electricity will be generated by friction, and it will accumulate on the plastic surface, which may cause fire and gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/04C08K9/06C08L23/06C09K3/16
Inventor 张新华李静王文清张学明李淼李晶王海波孙祖德
Owner CHINA PETROLEUM & CHEM CORP
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